Ed;
Unfortunately for you, their laser is always pointed where their
receiver is pointed-it's one unit.
Fortunately for you, their laser can't read your bike's speed at a range
of 5 miles!
Regards, Neil Tucson, AZ
-----Original Message-----
From: Ed Van Scoy [mailto:ed@vetteracing.com]
Sent: Monday, October 16, 2006 10:15 AM
To: Albaugh, Neil; Jon Bishop; land-speed@autox.team.net
Subject: Re: Timing light wires
Well Neil, The Gilbert Police Dept. doesn't seem to have problems with
their alignment and scintillation......... They were able to ticket me
with a lasar gun at 15 MPH over the limit on my Harley, in the rain.
However, I was actually doing 5 MPH less than what the officer
"clocked" me at sooooo. I'm for anything that will add 5 mph to my speed
at Bonneville!
Ed
Jon;
The problems with using a laser for free- space communications are:
1. Alignment-- a laser has an extremely narrow beam which makes
alignment difficult. This can be overcome by using a beam expander lens
but the laser power requirement goes up.
2. Scintillation-- over a long path, the heat refraction of the air
makes the optical signal unsteady, just like a "twinkling star";
overcoming this takes big mirrors or diversity receivers.
Think $$$$$$$$
Regards, Neil Tucson, AZ
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